package com.hmdp.utils;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

@Slf4j
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.判断是否需要拦截（ThreadLocal中是否有用户）
        if (UserHolder.getUser() == null) {
            // 没有，需要拦截，设置状态码
            log.info("用户没登录，无法访问");
            response.setHeader("X-Custom-Header", "myValue");
            response.setStatus(401);
            response.setContentType("text/html;charset=utf-8");
            response.getWriter().write("尝试往响应体里写数据,这是在拦截不合法请求后的测试");

            // 拦截
            return false;
        }
        // 有用户，则放行
        return true;
    }
}
